HVAC-Talk site will be slow for the next few days. It's normal site/server maintenance. Thx -Dad

Welcome to HVAC-Talk.com, a non-DIY site and the ultimate Source for HVAC Information & Knowledge Sharing for the industry professional! Here you can join over 150,000 HVAC Professionals & enthusiasts from around the world discussing all things related to HVAC/R. You are currently viewing as a NON-REGISTERED guest which gives you limited access to view discussions

To gain full access to our forums you must register; for a free account. As a registered Guest you will be able to:

Participate in over 40 different forums and search/browse from nearly 3 million posts.

Carrier chiller condenser fan problems

I ran across a Carrier Model 30RBB13064-5-7-3 today...had 2 condenser fans with the center hubs split in half, spinning wildly and generally making enough noise to make you want run for cover. These fan assemblies are made of plastic, and bolt on to the the motor shaft. They have keyways, but no setscrews. We just took this chiller under contract recently, not much service info left from previous service provider, other than a note that a fan/motor had been replaced 5-2-11 for the same reason. I won't give the exact price for two motors/blades we're getting hit with, but I will describe it generally as a mortgage payment. With a car payment to boot.
Anyway-has anyone run across problems on this model-or with other units with the same type of blade assembly? I'd be thinking loose mounts causing wobble and stress-only everything is tight. Likewise, the bolts securing the blades to the shafts were tight. Also no indication of short cycling.

I've got a dozon or so of those units and have worked on many more and have never had that problem. I really like the way those are setup, so easy to work on. I could not find a sb on it either. maybe the bolt was overtighted. if you figure it out let us know.

Thanks VAroadking-
I changed the motors and blades, and made sure ALL the fans were torqued to Carrier listed specs. The previous service provider lost another motor/blade on this unit almost exactly a year to the day I found the two failed the same day...Stuff like that always makes the short hairs on the back of my neck stand up.